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7 including “sleop paralysis", ‘trance states, Gilles do la Tourette! s disenos, lateh, An oranination of current dosoriptions-of disscots ive reactions reveals 4a rathor sterootypod concopt, differing Littlo fron A original one, and offering a linitod definition of the dissoolative mechaniezs ond their rolo in " wOorvinl “and abnornal psychological functioass The literaturo concerning olinical’ . entities ordinarily considered to constitute the dissociative roaotions is foirly woll linited $0 o aso~studies of pattonts: with h ugihess emneeiag, somnambulisne, snd multiplo persovalities. a mos, ee aw re Unpublished studies by the writer have led hin to a greatly expandod conaept Of dissociation. Dissociative Phencwens sre found in everyday life. Such mente | festations inolude *higeway hypnosis", states of ® fascination! in flyers, hyprae - gogic. and phantasy halluoinations, transient anesthesia, Bod many other Cxemplose These reactions havo many features in vormon with a varioty of clinical dicorders ~ "Arotio hystorin” » ead a nunber of other Aisturbdenoos in addition t the. wol2-known . discootative reactions of the textbooks. ee re en : V\ a Me . There is considerable oxperiuontal evidence poinging to the eimaificent role | ; played by distoclative moohanians in tne production of the various phenomena of : hypnosis. In faot, hypnosis may bo considered’ to bo a purasculture, laboratory. ; . : controlled dissootative reostion. OF? the ontire phenomenology or the various states desoribed above, there is not one sinzlo manifestation which ovnnot be produced oxperinentally in tho hypnotic subject. Thus, through tho use of hypnosio an a laboratory davioe, the dissooiative meohantens can be studiod with a high dovreas of odjeotivity. 7 Of incraasing interest at tho present tino are tha actions of a varioty of new dcucs whioh altor the stats of psyschologion2- functioning. Sono of thasa azonta produce disturbances of poroovtion and intgzration (nosoaline, lysurzic acid, ote.). Others produco alterations of autononia rasotivity through inhibition of soutral (hysothalumic?) functions, 80 that “exotiona) responsivenoss” is dininished ° (rosoryino, ohlorsrorazine, oto,}. The effoata of those aronts woda the production, Maintorsngd, and rcnifestations of dicsocttod status hxg novr tueon ntudied,